Heating and brazing torch



July 6, 1948. M. LIROGERS HEATING AND BRAZING TORCH Filed Oct; 28,11946 vm hf KN 69/ n\ w m Patented July 6, 1948 This invention relates to improvements in torches of the type having a single gas supply duct, adapted to use propane or like gas having a'slow rate of flame propagation. and provided with a tip which aflords a relatively non-intense flame jet such as is required for heating and brazing metals.

It is well known in the art that torch tips have the objectionable fault of getting very hot in use and transmitting the heat to the rest,of the torch. An important object of the present invention,

portion l2 and through the main .bore 9 of the therefore, is to provide an improved torch tip that will be free of this'heating fault.

Another object is to provide an improved heating and brazing torchrtip having an inner passage supplying the gas to a heating flame jet, and means surrounding the inner passage to supply the gas about the heating flame Jet so as to provide an outer annular secondary flame which supplements the inner heating flame jet.

A further object is to provide an improved heating and brazing torch tip which includes inner andouter tip members constructed and assembled to facilitate ready and economical manufacture, and to effectively supply the gas through an inner passage to an inner heating jet and through ,an outer space surrounding the inner passage to and about the heating flame jet.

The exact nature of the present invention, as well as more specific objects and features thereof, will become apparent from the following description when considered in connection with the accompanying drawing, in which:

Figure 1 is a view partly in side elevation, partly broken away, and partly in central longitudinal section, of a heating and brazing torch tip constructed in accordance with the present invention;

Figures 2, 3 and 4 are transverse sections taken respectively on line 2-2, line 3-3, and line 4-4 of Figure 1.

Referring in detail to the drawing, 5 indicates the outer tip member or body which is provided with a main bore 9. and which has a counterbore outer member 5 in spaced concentric relation to said main bore. The inner part of the portion M of the inner member ii is within the inner portion of the main bore 9 of the outer member 5 so that a relatively large annular chamber I6 is provided about said inner part of portion l4 and intermediate the ends of the outer member 5. Also, the outer part of member M has an enlargement or part 24 which is of increased diameter and which provides a restricted annular space l5 between said part 24 and the outer memher 5 that leads from the chamber l6 to'the tip end of the torch tip. Also, between the part 24 and the central part of the. end portion M which the part 24 surrounds, there is provided a second inner annular space 25. At its inner end, the

part 24 is provided with a, plurality of holes 26 which are disposed in forwardly converging relafillet 28. It will be seen that gas supplied to the interior of portion [2 will pass through the holes il into chamber l6 and fill the latter, some of the gas passing through holes 26 from chamber IE to. space 25 and issuing from said space 25 at the tip and of the torch tip to provide an inner main annular heating flame. Some of the gas also passes from chamber 16 through the outer annular space i5 and issues from the latter 'at the tip end of the torch tip to provide a second annular outer flame which surrounds and augments the main inner heating flame.

The inner portion l2 of the inner tip member ll projects inwardly beyond the inner end of the outer tip member or body 5 and receives an end of a single gas supply duct l9 that has a threaded inner end 20 to facilitate connection of the tip to an ordinary torch handle provided as usual on an end of an ordinary gas supply hose, not

shown. The parts 5, II and I9 are permanently joined in assembled relation by providing welding fillets 2| and 22, of metal, about the projecting inner part of the portion I2 and about the duct is adjacent the inner end of portion i2. The whole unit may then be plated exteriorly to provide a finished construction. The holes I! are drilled through the inner end of the inner portion ll of the inner tip member or body H 3 and in outwardly diverging relation to aflord communication between the interior of portion 12 and chamber II.

In operation, the end an or the duct i9 is connected to a torch handle in the well known way, and the gas is supplied to said duct I! so that it passes into the portion I! of the inner tip member II and through the holes I! into the chamber ii. The manner in which the gas passes to and issues from the spaces 25 and "to provide the main inner annular heating flame and the outer supplemental annular flame has already been described. .The unbroken annular fllm of gas escaping from the space 15 draws an unbroken layer of air over the outside surface of the tip body by a sort of aspirating action and thus prevents heat from radiating back into and heating the tip and the rest of the torch. Also, as the portion I4 is completely spaced from the outer tip member I, no material amount of heat is conducted from said portion ll of the inner tip member to the outer tip member 5. I

From the foregoing description, it is believed that the construction, operation and advantages of the'present invention will be readily understood and appreciated by those skilled in the art. Modifications and changes in construction are contemplated, such as fall within the scope of the invention as claimed.

What I claim is:

1. A heating and brazing tip comprising an I outer tip member having a main bore and having a counterbefore at its inner end, and an inner tip member having a hollow cylindrical end portion fitted in said counterbore of the outer tip member and a reduced axial outer portion extending through the main bore to define a surrounding large capacity gas chamber about the inner part of said axial outer portion, said inner portion having holes through its outer end leading to said gas chamber, theouter part of said axial portion being enlarged and spaced from the outer tip member to provide an outer anby said outer annular flame.

2. The construction defined in claim 1, wherein said enlarged outer part comprises a sleeve mounted on a central portion of the axial outer portion of the inner tip member and disposed in spaced concentric relation to said central portion to provide said second annular space, the second named holes being provided through said sleeve.

3. The construction defined in claim 1, wherein'said enlarged outer part comprises. a sleeve mounted on a central portion of the axial outer portion of the inner tip member and disposed in spaced concentric relation to said central portion to provide said second annular space, the second named holes being provided through said sleeve, and an integral neck on the inner end or said sleeve snugly fitted on the central portion of said axial outer portion of the inner tip member and permanently secured thereto. t

MALONE L. ROGERS.

Berni-mess crrsn The following references are of record in the file of this patent;

UNITED STATES PATENTS Number Name I Date 40 1,125,559 Kotod Jan. 19, 1915 1,483,467 Meden Feb. 12, 1924 1,540,676 Bagley June 2, 1925 1,975,371 Charles at al. Sept. 11, 1934 

